LIN COMMUNICATION SYSTEM, Diagnostic DTC:B2321

DTC Code DTC Name
B2321 Driver Side Door ECU Communication Stop

DESCRIPTION

This DTC is stored when LIN communication between the front power window regulator motor assembly LH*1 or front power window regulator motor assembly RH*2 and main body ECU (multiplex network body ECU) stops for 10 seconds or more.


DTC No. Detection Item DTC Detection Condition Trouble Area
B2321 Driver Side Door ECU Communication Stop No communication between the front power window regulator motor assembly LH*1 or front power window regulator motor assembly RH*2 and main body ECU (multiplex network body ECU) for 10 seconds or more.

  • Front power window regulator motor assembly LH*1

  • Front power window regulator motor assembly RH*2

  • Multiplex network master switch assembly

  • Main body ECU (multiplex network body ECU)

  • Instrument panel junction block assembly

  • Harness or connector

WIRING DIAGRAM


  1. for LHD

    A01MGQFE02

  2. for RHD

    A01MGQFE03

CAUTION / NOTICE / HINT

Note


  • When using the GTS with the power switch off to troubleshoot:

    Connect the GTS to the vehicle and turn a courtesy light switch on and off at 1.5 second intervals until communication between the GTS and vehicle begins.

  • Inspect the fuses for circuits related to this system before performing the following inspection procedure.

  • When the front power window regulator motor assembly is removed and reinstalled or replaced, the front power window regulator motor assembly must be initialized.

    Click here

  • If the main body ECU (multiplex network body ECU) is replaced, refer to the Service Bulletin.

Tech Tips

DTC B2325 is output when the communication between all of the following components and main body ECU (multiplex network body ECU) stops.

Click here

PROCEDURE


  1. CLEAR DTC


    1. Clear the DTCs.

      Click here


      Body Electrical > Main Body > Clear DTCs
      Result
      Result
      NEXT

    NEXT

  2. CHECK FOR DTC


    1. Check for DTCs.

      Click here


      Body Electrical > Main Body > Trouble Codes
      Result
      Result Proceed to
      DTC B2321 is not output A
      DTC B2321 is output B

    A

    USE SIMULATION METHOD TO CHECK Click here

    B

  3. INSPECT MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY


    1. A01MJTNC05
      *a

      Component without harness connected

      (Multiplex Network Master Switch Assembly)

      Remove the multiplex network master switch assembly.

      Click here

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      N3-16 (LIN2) - N3-17 (LIN1) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY Click here

    OK

  4. CHECK HARNESS AND CONNECTOR (MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY - FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY)


    1. for LHD


      1. Disconnect the N3 multiplex network master switch assembly connector.

      2. Disconnect the L12 front power window regulator motor assembly LH connector.

      3. Measure the resistance according to the value(s) in the table below.

        Standard Resistance
        Tester Connection Condition Specified Condition
        N3-16 (LIN2) - L12-9 (LIN) Always Below 1 Ω
        N3-16 (LIN2) or L12-9 (LIN) - Body ground Always 10 kΩ or higher

    2. for RHD


      1. Disconnect the N3 multiplex network master switch assembly connector.

      2. Disconnect the L3 front power window regulator motor assembly RH connector.

      3. Measure the resistance according to the value(s) in the table below.

        Standard Resistance
        Tester Connection Condition Specified Condition
        N3-16 (LIN2) - L3-9 (LIN) Always Below 1 Ω
        N3-16 (LIN2) or L3-9 (LIN) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK HARNESS AND CONNECTOR (FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY - POWER SOURCE CIRCUIT)


    1. A01MIFWC41
      *a

      Front view of wire harness connector

      (to Front Power Window Regulator Motor Assembly LH)

      for LHD


      1. Disconnect the front power window regulator motor assembly LH connector.

      2. Measure the resistance according to the value(s) in the table below.

        Standard Resistance
        Tester Connection Condition Specified Condition
        L12-1 (GND) - Body ground Always Below 1 Ω

      3. Measure the voltage according to the value(s) in the table below.

        Standard Voltage
        Tester Connection Switch Condition Specified Condition
        L12-2 (B) - Body ground Power switch off 11 to 14 V
    2. A01MIFWC45
      *a

      Front view of wire harness connector

      (to Front Power Window Regulator Motor Assembly RH)

      for RHD


      1. Disconnect the front power window regulator motor assembly RH connector.

      2. Measure the resistance according to the value(s) in the table below.

        Standard Resistance
        Tester Connection Condition Specified Condition
        L3-1 (GND) - Body ground Always Below 1 Ω

      3. Measure the voltage according to the value(s) in the table below.

        Standard Voltage
        Tester Connection Switch Condition Specified Condition
        L3-2 (B) - Body ground Power switch off 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. REPLACE FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY


    1. for LHD


      1. Temporarily replace the front power window regulator motor assembly LH with a new or normally functioning one.

        Click here

      2. Clear the DTCs.

        Click here


        Body Electrical > Main Body > Clear DTCs

    2. for RHD


      1. Temporarily replace the front power window regulator motor assembly RH with a new or normally functioning one.

        Click here

      2. Clear the DTCs.

        Click here


        Body Electrical > Main Body > Clear DTCs
      Result
      Proceed to
      NEXT

    NEXT

  7. CHECK FOR DTC


    1. Check for DTCs.

      Click here


      Body Electrical > Main Body > Trouble Codes
      Result
      Result Proceed to
      DTC B2321 is not output A
      DTC B2321 is output (for LHD) B
      DTC B2321 is output (for RHD) C

    A

    END (FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY LH WAS DEFECTIVE)

    B

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

    C

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here